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Current Online Updates*
The Latest Dive News  Subscribe to RSS Feed for Undercurrent Dive News What's this?

Updated August 18, 2021
These brief news articles below were sent out via email to all divers who signed up for our free email list.
You can sign up here to receive future Undercurrent Online Updates and get news alerts and special offers like these every month.

Freediving and Scuba May Enhance the Side Effects of the Vaccine
Only Your Computer Counts
Become an Undercurrent Subscriber Today
Camping at Sea
Carbon Monoxide Poisoning at a Scuba School
Who Knew?
Using the Wrong Sunscreen Can Cost

Freediving and Scuba May Enhance the Side Effects of the Vaccine  August 18, 2021

Free divingDiver Alert Network (DAN) reminds us that divers should keep out of the water about seven days after receiving the COVID vaccination and keep that in mind when it's time for your booster. Mild side effects are common in the first three days, and these can include a sore arm, red at the injection site, fever/chills, headache, fatigue, muscle aches, or nausea, which may be enhanced by increased ambient pressure. As for the side effects, not to worry; they simply indicate your body is building an immune response (called 'reactogenicity').

Only Your Computer Counts   August 18, 2021

Recently, we've received too many reports of divers depending on a guide's computer to finish their dive. It doesn't work that way. Your computer keeps YOU safe from the bends by monitoring YOUR time and YOUR depth to compute, through its algorithm, YOUR safe ascent time. You need to be fully versed in what the data on the screen tells you. Different computers use different algorithms and give different results, some more liberal than others. The only computer that is accurate for your dive is the one YOU carry. No other diver has the same dive profile you had (or, most likely, the same algorithm). If you wish to carry a backup computer, make it identical to your primary computer.

Become an Undercurrent Subscriber Today  August 18, 2021

Right now, we’re offering a 6-month subscription for just $16.95, that includes more-than-monthly emails with much more detailed and timely information (this email is for nonsubscribers only), four full issues, chock full of dive reviews, reader reports, travel tips – you have to be careful with COVID – and much, much more. Last month we reviewed Cozumel (subscribers can view it on our website) and coming up are liveaboard and resort reviews covering Saba, Belize, Bonaire, Bahamas, Hawaii, and much, much more. Subscribe now to get full access to the scores of reader reports being filed that detail dive resort and liveaboard diving in this difficult new world. And, if you don't like what you get, I'll give your money back, no questions asked. Click here to subscribe now.

Camping at Sea

Camping at Sea   August 18, 2021

The press calls it an inflatable tent, but it is an inverted tent that holds air underwater so that divers can effectively use it for camping out. It was invented by Winslow Burleson, a professor at the University of Arizona College, and professional diver Michael Lombardi. The tent provides a relatively dry and protected space underwater for divers to enter, remove their equipment, and carry out tasks before returning to the surface. The high-tech habitat provides a place for divers to decompress after deep scientific dives and even an underwater facility to treat decompression sickness in remote locations. It also provides shelter for long-term observations of wildlife behavior. The highly portable system can provide adequate life support to two occupants through an overnight stay.

Carbon Monoxide Poisoning at a Scuba School  August 18, 2021

The director of U.K. company Aqua Logistics, Geoffrey Shearn, narrowly avoided a jail term this month after the tanks his company filled from a 'modified compressor' for a 2017 Manchester, England, school scuba class were found to be contaminated with carbon monoxide, poisoning eight children and putting two in a hospital, one who had to be put in an induced coma. The company was fined the equivalent of $13,000 with more than $15,000 in Court fees. Daily Mail

Hammerhead shark

Who Knew?  August 18, 2021

Most movies portray sharks in a negative light, hurting conservation efforts. It all appears to have started with JAWS, and the Daily Mail reports that 96 percent of shark movies since then portray interactions between humans and sharks as overtly threatening. Around two percent of 548 known shark species have been involved in shark attacks, and the chance of being killed by a shark in U.S. waters is around 3.7 million to one, but don't let the truth get in the way of a good story.

Using the Wrong Sunscreen Can Cost  August 18, 2021

Thailand has just banned the use of sunscreens that damage coral, joining Palau and Hawaii. You may think that's a drop in the ocean regarding the ecological damage we're doing to the planet, but you may be more concerned with the damage to your bank balance if you are caught flouting the rule: Fines in Thailand approach $3000. The banned lotions are those containing oxybenzone, octinoxate, 4-methylbenzylidene camphor or butylparaben. BBC

Stay Safe
Wear a Mask, Get Vaccinated
Don’t Share Your Air

Ben Davison, editor/publisher


Note: Undercurrent is a registered 501(c) (3) not-for-profit organization donating funds to help preserve coral reefs. Our travel writers never announce their purpose, are unknown to the destination, and receive no complimentary services or compensation from the dive operators or resort.

Highlights of Previous Online Updates*

Here are past Online Update emails sent out . You can sign-up for free to receive these in the future here.

16 February, 2024

15 January, 2024

16 December, 2023

28 November, 2023

25 October, 2023

26 September, 2023

18 August, 2023

20 July, 2023

12 June, 2023

27 May, 2023

22 April, 2023

21 March, 2023

21 February, 2023

22 January, 2023

17 December, 2022

26 November, 2022

19 October, 2022

23 September, 2022

15 August, 2022

21 July, 2022

21 June, 2022

16 May, 2022

29 April, 2022

30 March, 2022

25 February, 2022

24 January, 2022


3 December, 2021

27 October, 2021

21 September, 2021

August 18, 2021

28 July, 2021

12 June, 2021

21 May, 2021

26 April, 2021

11 April, 2021

27 March, 2021

12 March, 2021

28 February, 2021

9 February, 2021

31 January, 2021

20 January, 2021

5 January, 2021

20 December, 2020

1 December, 2020

15 November, 2020

1 November, 2020

13 October, 2020

1 October, 2020

21 September, 2020

9 September, 2020

21 August, 2020

8 August, 2020

18 July, 2020

8 July, 2020

25 June, 2020

9 June, 2020

May, 2020

April, 2020

March, 2020

February, 2020

January, 2020

Online Updates* Archive, 2000-2019

* Sometimes referred to as Upwellings

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